#include <io/usart.h>
#include <sys/atomic.h>

#if defined(__USART_BUFFER__)

	int		usart_tx		(uint8_t _usart,void *data,int size){
		usart_t *usart = usart_device_get(_usart);
		
		if (usart){
			ATOMIC
			
			buffer_set( &(usart->tx), data, size );
			if (data && size){
				usart->mode_set(usart, USART_MODE_TX);
			} else {
				usart->mode_clear(usart, USART_MODE_TX);
			};
			return ESUCCESS;
		};
		return -ENOFILE;
	};

	int		usart_tx_done	(uint8_t _usart){
		usart_t *usart = usart_device_get(_usart);
		if (usart){
			return buffer_free( &(usart->tx) );
		};
		return -ENOFILE;
	};

	int		usart_rx		(uint8_t _usart,void *data,int size){
		usart_t *usart = usart_device_get(_usart);
		
		if (usart){
			ATOMIC
			
			buffer_set( &(usart->rx), data, size );
			if (data && size){
				usart->mode_set(usart, USART_MODE_RX);
			} else {
				usart->mode_clear(usart, USART_MODE_RX);
			};
			return ESUCCESS;
		};
		return -ENOFILE;
	};

	int		usart_rx_done	(uint8_t _usart){
		usart_t *usart = usart_device_get(_usart);
		if (usart){
			return buffer_free( &(usart->rx) );
		};
		return -ENOFILE;
	};

#else

int		usart_read		(uint8_t _usart){
	ATOMIC
	usart_t *usart = usart_device_get(_usart);
	if (usart){
		int ch = usart_fifo_read( &(usart->rx) );
		if (ch >= 0){
			usart->mode_set( usart, USART_MODE_RX );
		};
		return ch;
	};
	return -ENOFILE;
};

int		usart_write		(uint8_t _usart,int ch){
	ATOMIC
	usart_t *usart = usart_device_get(_usart);
	if (usart){
		usart->mode_set( usart, USART_MODE_TX );
		return usart_fifo_write( &(usart->tx), ch );
	};
	return -ENOFILE;	
};

int usart_tx		(uint8_t usart,char *b,int size){
	int n,r, tries;
	tries = 10;
	for (n=0;n<size;n++){
		for (r=0;r<tries;r++){
			if (usart_write( usart, *b) >= 0){
				b++;
				break;
			};
			if(r == tries - 1) {
				return -EFAIL;
			}
			wait_ms(1);
		};
	};
	return ESUCCESS;
};

	
#endif